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Applied Physics Colloquium: February 29: Jens Rieger

Applied Physics Colloquium

Precursor Structures in Crystallization/Precipitation Processes

Jens Rieger
BASF Advanced Research Initiative

4:00 pm, February 29
refreshments start at 3:30 pm
209 Pierce Hall
Harvard University

Crystallization of inorganic (and organic) matter often proceeds via intermediate stages – rather than by simple nucleation and growth mechanisms (1). 
Recent time-resolved studies on the structural evolution of precipitating CaCO3 obtained by means of X-ray microscopy and quench cryo-transmission electron microscopy will be presented, emphasizing the role of precursor structures that not only comprise crystal modifications that are less stable than the final one (Ostwald’s rule of stages), but also amorphous, hydrated (nano-) particles and emulsion-like precursors structures (2). The mode of action that water-soluble polymers play during the formation of calcium carbonate precursors and crystals will be discussed

Naomi Brave
Center Coordinator
Nanoscale Science and Engineering Center
School of Engineering and Applied Sciences
Harvard University
29 Oxford Street
Pierce Hall room 228
Cambridge, MA 02138

Tel (617) 495-1027
Fax (617) 495-9837